Analysis
- max time kernel
150s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows - submitted
17/08/2026, 18:19
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-08-17_b4ecc06873647511b3a7cd463e76fb8c_cryptolocker_elex.exe
Resource
win10v2004-20260513-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-08-17_b4ecc06873647511b3a7cd463e76fb8c_cryptolocker_elex.exe
Resource
win11ltsc2024-20260709-en
5 signatures
150 seconds
General
- Target 2026-08-17_b4ecc06873647511b3a7cd463e76fb8c_cryptolocker_elex.exe
- Size 51KB
- Sample260817-wyncpsfn6t
- SHA256 af7937c828978f99434c54d2c8320dbcc65e020bd91bdced43f8f6b2de299a70
- MD5 b4ecc06873647511b3a7cd463e76fb8c
- SHA1 94b251c47a51333a27dd59fd34d750b9da7b4b7d
- SHA512 2d8f51acf94503950b4a9d671b2837b40d2bca3c5e5f8cbc89df9547ec74e4bc9da56617ede50c98063a1b74f32cd33612b11efc24e6549303d948ec30bfaa87
- SSDEEP 768:bgX4zYcgTEu6QOaryfjqDGgIvq3ncSpcXCAzr2ZEXIK/Nr:bgGYcA/53GAGgIvF9v2Zu
- TLSH T1A13322387FE56972E37BCFB586F691C2B935B8223D16980D40DA43844833F65DCA1A1E
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral1/memory/3144-2-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x0009000000024307-13.dat CryptoLocker_rule2 behavioral1/memory/1180-17-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral1/memory/1180-25-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 - Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1788976790-1541110888-1636651838-1000\Control Panel\International\Geo\Nation 2026-08-17_b4ecc06873647511b3a7cd463e76fb8c_cryptolocker_elex.exe - Executes dropped EXE 1 IoCs
pid Process 1180 hasfj.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language hasfj.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 2026-08-17_b4ecc06873647511b3a7cd463e76fb8c_cryptolocker_elex.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 3144 wrote to memory of 1180 3144 2026-08-17_b4ecc06873647511b3a7cd463e76fb8c_cryptolocker_elex.exe 84
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-08-17_b4ecc06873647511b3a7cd463e76fb8c_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-08-17_b4ecc06873647511b3a7cd463e76fb8c_cryptolocker_elex.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3144 -
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:1180
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\hasfj.exe
- Size 51KB
- SHA256 edbf9269b0bd6e226ce12eab5cddf11fd95099bb84035bdfafcad04804319c7b
- MD5 b42479a4b9b377f9d9d0407f5a3b78cc
- SHA1 54611965db9ebefdd5b9e7f97d36bb5c2f41702f
- SHA512 4f58dcc2f098594227fccbe3534fdc995ae3a8da4f1cddafba4985f80990219c4d46b26e67591a83fcf77776eec6595845293ef5275737221d2bac85e610841c
- SSDEEP 768:bgX4zYcgTEu6QOaryfjqDGgIvq3ncSpcXCAzr2ZEXIK/NfU:bgGYcA/53GAGgIvF9v2Z0U
- TLSH T16E3322387FE56972E37BCFB586F691C2B935B8223D16980D40DA43844833F65DCA1A1E
- MD5 SHA1 SHA512 SSDEEP TLSH